US8424502B2 - Intake manifold - Google Patents
Intake manifold Download PDFInfo
- Publication number
- US8424502B2 US8424502B2 US12/749,574 US74957410A US8424502B2 US 8424502 B2 US8424502 B2 US 8424502B2 US 74957410 A US74957410 A US 74957410A US 8424502 B2 US8424502 B2 US 8424502B2
- Authority
- US
- United States
- Prior art keywords
- surge tank
- intake manifold
- intake
- inlet
- segment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
- F02M35/10026—Plenum chambers
- F02M35/10039—Intake ducts situated partly within or on the plenum chamber housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/1034—Manufacturing and assembling intake systems
- F02M35/10354—Joining multiple sections together
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/104—Intake manifolds
- F02M35/116—Intake manifolds for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft
Definitions
- the present invention relates to an intake manifold in the intake system of an automobile engine.
- the intake manifold disclosed in Japanese Laid-Open Patent Publication No. 9-177624 includes a surge tank and a plurality of intake pipes each having an inlet port.
- the inlet ports of the intake pipes are connected to and protrude into the surge tank.
- the inlet ports extend in a direction of air flow from the opening of the surge tank, and are arranged along a direction perpendicular to the air flow direction.
- the intake manifold disclosed in Japanese Laid-Open Patent Publication No. 2008-184939 also includes a surge tank and a plurality of intake pipes each having an inlet port.
- the inlet ports of the intake pipes are connected to and protrude into the surge tank. These inlet ports are provided symmetrically on both sides of the opening of the surge tank, and are arranged along the flow direction of air from the surge tank opening.
- the inlet ports are arranged inside the surge tank.
- a great turbulence is likely to be generated about each inlet port.
- Such turbulence disturbs smooth intake of air, possibly deteriorates the intake performance, and, as a result, lowers the combustion efficiency of the engine.
- a pair of the inlet ports are arranged on either side of the surge tank along the direction of air flow, and open in a direction perpendicular to the flow direction of air. This is likely to generate a great turbulence between adjacent inlet ports, and particularly lowers the intake performance of the inlet ports on the downstream side. As a result, the amount of air drawn into the inlet ports becomes uneven. This not only lowers the combustion efficiency, but also generates irregular vibration as the engine operates.
- the present invention was made for solving the above problems in the prior art. Accordingly, it is an objective of the present invention to provide an intake manifold that improves the intake performance and has a reduced weight.
- an intake manifold including a surge tank and a plurality of intake pipes each having an inlet port.
- the inlet ports are connected to the surge tank.
- the intake manifold draws air into the surge tank from an opening of the surge tank and supplies the air to an engine through the intake pipes.
- the inlet ports are arranged along a flow direction of air drawn into the surge tank from the opening of the surge tank, and project into the surge tank along a direction that intersects the flow direction at the surge tank opening.
- Each adjacent pair of the inlet ports are separated only by a single common pipe wall.
- FIG. 1 is a front view illustrating an intake manifold according to one embodiment of the present invention
- FIG. 2 is a cross-sectional view taken along line 2 - 2 of FIG. 1 ;
- FIG. 3 is a cross-sectional view taken along line 3 - 3 of FIG. 1 ;
- FIG. 4 is an enlarged cross-sectional view illustrating part of FIG. 2 ;
- FIG. 5 is a partial perspective view illustrating the intake manifold from which the second segment of the framework has been removed.
- FIG. 6 is a partial cross-sectional view taken along line 6 - 6 of FIG. 3 .
- the intake manifold 11 is mounted in a horizontally-opposed four-cylinder engine.
- the left-right direction in FIG. 1 is defined as left-right direction of the intake manifold 11
- a direction perpendicular to the sheet of FIG. 1 is defined as the front-rear direction of the intake manifold 11 .
- the intake manifold 11 of the present embodiment is made of a heat resistant synthetic resin (for example, polyamide resin), and includes a surge tank 12 and pairs of intake pipes 13 provided on the left and right sides of the surge tank 12 .
- the intake pipes 13 each correspond to one of the combustion chambers provided on both sides of the horizontal-opposed engine.
- Each pair of intake pipes 13 is formed by main bodies 13 c and an inlet pipe member 17 , which is formed separately from the main bodies 13 c .
- the inlet pipe members 17 are incorporated in the surge tank 12 .
- the surge tank 12 and the main bodies 13 c of the intake pipes 13 form a framework 16 of the intake manifold 11 .
- the surge tank 12 is located at the center of the framework 16 .
- the framework 16 includes a first segment 16 A located in a lower portion and a second segment 16 B, which is fixed to the top of the first segment 16 A.
- the surge tank 12 has on its front (lower surface as viewed in FIG. 2 ) an opening 12 a for drawing in air.
- the opening 12 a is connected to an air duct (not shown), which supplies air that has been filtered by an air cleaner (not shown) to the surge tank 12 .
- the air duct not shown
- the one that is located on the upstream side in the flow direction of air introduced into the surge tank 12 through the opening 12 a has an inlet port 13 a connected to the surge tank 12
- the one on the downstream side has an inlet port 13 b connected to the surge tank 12 .
- the inlet ports 13 a , 13 b are formed in the corresponding inlet pipe member 17 , and arranged to be left-right symmetrical along the flow direction of air drawn into the surge tank 12 through the opening 12 a .
- the inlet ports 13 a , 13 b open in directions intersecting the flow direction of air and protrude into the surge tank 12 .
- the inlet ports 13 a , 13 b of the each inlet pipe member 17 are adjacent to each other along the flow direction of air, that is, along the front-rear direction, and are separated only by a common pipe wall 18 . That is, the inlet ports 13 a , 13 b are arranged on the upstream side and the downstream side of the air flow direction, respectively, while being separated by the distance corresponding to the thickness of the common pipe wall 18 .
- the distal portion of the common pipe wall 18 protrudes into the surge tank 12 .
- the front and rear sides of the distal portion of the common pipe wall 18 that is, the surface on the upstream side and the surface on the downstream side in the air flow direction, each have a convex surface 18 a that converges in the protruding direction at the distal portion.
- the inlet port 13 b on the downstream side in the air flow direction protrudes further into the surge tank along a direction that intersects the flow direction of air at the opening 12 a , that is, further toward the center of the surge tank 12 , than the inlet port 13 a on the upstream side.
- the first segment 16 A has an open upper end
- the second segment 16 B has an open lower end.
- a flange 19 projecting outward is formed on the outer periphery of the opening of the first segment 16 A.
- a protrusion 19 a which functions as a weld zone, is formed on the flange 19 .
- a flange 20 projecting outward is formed on the outer periphery of the opening of the second segment 16 B.
- the flange 20 corresponds to the flange 19 of the first segment 16 A.
- a protrusion 20 a which serves as a weld zone, is formed on the lower surface of each flange 20 .
- the protrusion 20 a is contactable with the protrusion 19 a on the first segment 16 A.
- a pair of left and right engagement grooves 21 are formed on the front and rear side walls of the first segment 16 A, near the left and right ends of the surge tank 12 . These engagement grooves 21 are formed in the inner sides of the flange 19 to extend along the left-right direction. In the vicinity of each engagement groove 21 , a positioning projection 22 is formed on the inner wall of the first segment 16 A. In an upper end portion of each positioning projection 22 , a positioning portion 22 a having a predetermined width in the left-right direction is formed.
- left and right support plates 23 are provided, which are integrally formed with the inlet pipe member 17 .
- Each support plate 23 has an engagement projection 24 , which is engageable with the engagement groove 21 formed on the flange 19 of the first segment 16 A.
- a pair of positioning pieces 25 are formed on the lower surface of each support plate 23 . The positioning pieces 25 are separated along the left-right direction from each other by a predetermined distance, and engageable with the left and right side surfaces of the corresponding positioning portion 22 a.
- the engagement of the upper surfaces of the positioning projections 22 and the lower surfaces of the support plates 23 determines the positions of the inlet pipe member 17 in the up-down direction. Also, the engagement of the engagement grooves 21 and the engagement projections 24 determines the positions of the inlet pipe members 17 in the front-rear direction. At the same time, the engagement of the positioning portions 22 a and the positioning pieces 25 determines the positions of the inlet pipe members 17 in the left-right direction.
- a cylindrical weld projection 26 and a rectangular parallelepiped weld projection 27 are formed on the upper surface of each support plate 23 of each inlet pipe member 17 .
- Two projections 28 , 29 functioning as weld zones are formed on front and rear lower portions of the second segment 16 B. The projections 28 , 29 are contactable with the projections 26 , 27 .
- the protrusions 19 a , 20 a which are weld zones of the segments 16 A, 16 B, contact each other.
- the weld projections 28 , 29 of the second segment 16 B contact the weld projections 26 , 27 of the inlet pipe members 17 .
- vibration is applied to the second segment 16 B, so that friction is generated between the weld protrusions 19 a , 20 a and between the weld projections 28 , 29 and the weld projections 26 , 27 .
- the weld protrusions 19 a and 20 a , and the weld projections 28 , 29 and 26 , 27 are melted and fixed to each other.
- the vibration welding integrates the segments 16 A and 16 B of the framework 16 with each other, and integrates the inlet pipe members 17 and the framework 16 with each other.
- an air duct is connected to the opening 12 a of the surge tank 12 , and the distal end of each intake pipe 13 is connected to an intake port of the engine. If the engine is started in this state, air is drawn into the surge tank 12 through the opening 12 a , and introduced into the intake pipes 13 through the inlet ports 13 a , 13 b . The air is then supplied to the combustion chambers of the engine.
- the inlet ports 13 a , 13 b are arranged along the flowing direction of air drawn into the surge tank 12 through the opening 12 a , and the front and rear inlet ports 13 a , 13 b are arranged adjacent to each other with the common pipe wall 18 disposed therebetween.
- the front and rear adjacent inlet ports 13 a , 13 b are separated from each other only by the thickness of the common pipe wall 18 .
- flow velocity difference or turbulence hardly occurs between the inlet ports 13 a and 13 b .
- the convex surfaces 18 a which converge toward the distal end, are formed on both surfaces of the distal portion of the common pipe wall 18 between the adjacent inlet ports 13 a and 13 b .
- This structure inhibits the occurrence of swirl of air and allows air to smoothly flows to the downstream side along the convex surfaces 18 a .
- the present embodiment has the following advantages.
- the convex surfaces 18 a which converge toward the distal end, are formed on both surfaces of the distal portion of the common pipe wall 18 between the adjacent inlet ports 13 a and 13 b . This prevents the common pipe wall 18 from causing turbulence, and smoothly supplies air to the inlet port 13 b on the downstream side. Therefore, not only the intake performance of the intake manifold 11 is improved, but also air is equally supplied to the front and rear inlet ports 13 a , 13 b.
- the inlet port 13 b located on the downstream side in the air flow direction projects further toward the air introducing side than the inlet port 13 a on the upstream side. This improves the air introducing performance of the inlet port 13 b on the downstream side of the air flow direction, thereby further equalizing the amount of air drawn into the inlet ports 13 a , 13 b.
- Each pair of intake pipes 4 is formed by main bodies 13 c and an inlet pipe member 17 , which is formed separately from the main bodies 13 c . Therefore, if the inlet pipe members 17 are configured to protrude into the surge tank 12 in order to reduce the overall size, it is easy to form the framework 16 constituted by the main bodies 13 c of the intake pipes 13 and the surge tank 12 .
- the framework 16 includes the first segment 16 A and the second segment 16 B.
- the first segment 16 A and the second segment 16 B are fixed to each other by vibration welding.
- the framework 16 and the inlet pipe members 17 are fixed to each other by vibration welding. Therefore, the assembly of the inlet pipe members 17 to the framework 16 is simplified.
- the inlet pipe members 17 are positioned in relation to the first segment 16 A, and welded to the second segment 16 B. This simplifies the structure of the intake manifold 11 and facilitates the assembly.
- the components of the intake manifold 11 only include the framework 16 including the first and second segments 16 A, 16 B and the inlet pipe members 17 . Accordingly, the number of components of the intake manifold 11 is reduced, and the assembly is simplified. Furthermore, since the entire intake manifold 11 is formed of a synthetic resin, weight reduction is achieved.
- the framework 16 may be formed by three or more segments.
- the present invention may be applied to intake manifolds formed by a material other than synthetic resin, such as an aluminum alloy.
- the main bodies 13 c of the intake pipes 13 and the inlet pipe members 17 may be formed integrally.
- the inlet port 13 b which is located on the downstream side of the flow direction of air introduced through the opening 12 a of the surge tank 12 , may protrude by the same amount as the inlet port 13 a on the upstream side. Also, the inlet port 13 a on the upstream side may protrude further into the surge tank 12 along a direction that intersects the flow direction of air at the surge tank opening 12 a than the inlet port 13 b on the downstream side.
- the shape of the sides of the distal portion of the common pipe wall 18 is not particularly limited, but may be formed into shapes other than that shown in above.
- the sides may be flat.
- the present invention may be applied to the intake manifold of an inline engine.
- the inlet ports 13 a of intake pipes 13 are arranged only on one side of the surge tank 12 . It is preferable that the closer to the downstream end, the more projected into the flow passage of the air the inlet port becomes.
- the number of the intake pipes 13 may be changed.
- three intake pipes 13 each having an inlet port are provided on either side, and a total of six intake pipes 13 are provided.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Characterised By The Charging Evacuation (AREA)
Abstract
Description
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-087923 | 2009-03-31 | ||
JP2009087923A JP2010236517A (en) | 2009-03-31 | 2009-03-31 | Intake manifold |
Publications (2)
Publication Number | Publication Date |
---|---|
US20100242892A1 US20100242892A1 (en) | 2010-09-30 |
US8424502B2 true US8424502B2 (en) | 2013-04-23 |
Family
ID=42782581
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/749,574 Expired - Fee Related US8424502B2 (en) | 2009-03-31 | 2010-03-30 | Intake manifold |
Country Status (2)
Country | Link |
---|---|
US (1) | US8424502B2 (en) |
JP (1) | JP2010236517A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5617382B2 (en) | 2010-06-28 | 2014-11-05 | トヨタ紡織株式会社 | Intake manifold |
JP2014084987A (en) * | 2012-10-26 | 2014-05-12 | Mahle Filter Systems Japan Corp | Partition member fitting structure |
JP6036539B2 (en) * | 2013-05-15 | 2016-11-30 | トヨタ紡織株式会社 | Intake manifold |
JP6175274B2 (en) * | 2013-05-15 | 2017-08-02 | 株式会社Subaru | Manufacturing method of intake manifold |
JP6302953B2 (en) * | 2016-05-09 | 2018-03-28 | 本田技研工業株式会社 | Intake device for V-type internal combustion engine |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3520284A (en) * | 1967-06-03 | 1970-07-14 | Porsche Kg | Internal combustion engine air intake |
JPH06235357A (en) | 1992-11-04 | 1994-08-23 | Suzuki Motor Corp | Intake device for engine |
JPH09177624A (en) | 1995-12-22 | 1997-07-11 | Toyoda Gosei Co Ltd | Intake manifold made of resin and its manufacture |
JPH10318056A (en) | 1997-05-20 | 1998-12-02 | Toyo Roki Seizo Kk | Intake device |
JP2005016348A (en) | 2003-06-24 | 2005-01-20 | Yanmar Co Ltd | Intake pipe |
JP2005273454A (en) | 2004-03-22 | 2005-10-06 | Yamaha Motor Co Ltd | Fuel supply system and vehicle |
JP2008184939A (en) | 2007-01-29 | 2008-08-14 | Daikyo Nishikawa Kk | Resin-made intake manifold |
US20100000489A1 (en) | 2008-07-04 | 2010-01-07 | Toyota Boshoku Kabushiki Kaisha | Integrated valve device for intake manifold |
US20100012070A1 (en) | 2008-07-18 | 2010-01-21 | Toyota Boshoku Kabushiki Kaisha | Intake manifold |
-
2009
- 2009-03-31 JP JP2009087923A patent/JP2010236517A/en active Pending
-
2010
- 2010-03-30 US US12/749,574 patent/US8424502B2/en not_active Expired - Fee Related
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3520284A (en) * | 1967-06-03 | 1970-07-14 | Porsche Kg | Internal combustion engine air intake |
JPH06235357A (en) | 1992-11-04 | 1994-08-23 | Suzuki Motor Corp | Intake device for engine |
JPH09177624A (en) | 1995-12-22 | 1997-07-11 | Toyoda Gosei Co Ltd | Intake manifold made of resin and its manufacture |
JPH10318056A (en) | 1997-05-20 | 1998-12-02 | Toyo Roki Seizo Kk | Intake device |
JP2005016348A (en) | 2003-06-24 | 2005-01-20 | Yanmar Co Ltd | Intake pipe |
JP2005273454A (en) | 2004-03-22 | 2005-10-06 | Yamaha Motor Co Ltd | Fuel supply system and vehicle |
US7637242B2 (en) | 2004-03-22 | 2009-12-29 | Yamaha Motor Co., Ltd. | Fuel supply system and vehicle |
JP2008184939A (en) | 2007-01-29 | 2008-08-14 | Daikyo Nishikawa Kk | Resin-made intake manifold |
US20100000489A1 (en) | 2008-07-04 | 2010-01-07 | Toyota Boshoku Kabushiki Kaisha | Integrated valve device for intake manifold |
US20100012070A1 (en) | 2008-07-18 | 2010-01-21 | Toyota Boshoku Kabushiki Kaisha | Intake manifold |
Non-Patent Citations (2)
Title |
---|
Japan Office action, mail date is Feb. 26, 2013. |
Japan Office action, mail date is Jul. 31, 2012. |
Also Published As
Publication number | Publication date |
---|---|
US20100242892A1 (en) | 2010-09-30 |
JP2010236517A (en) | 2010-10-21 |
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Owner name: FUJI JUKOGYO KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TAKAKUWA, MINORU;INABA, HIDEKI;IZUMI, KEITA;SIGNING DATES FROM 20100226 TO 20100324;REEL/FRAME:024157/0241 Owner name: TOYOTA BOSHOKU KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TAKAKUWA, MINORU;INABA, HIDEKI;IZUMI, KEITA;SIGNING DATES FROM 20100226 TO 20100324;REEL/FRAME:024157/0241 |
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